A Systematic Investment Plan (SIP) invests a fixed amount every month — into a mutual fund in India, and into exactly the same idea under a different name almost everywhere else: a monthly investment plan, a regular savings plan, or an automatic contribution. Because each instalment compounds for a different length of time, the growth curve bends upward sharply in the later years, which is why the duration slider usually moves your result more than the amount slider does.
This calculator is currency-independent. It works the same whether you invest ₹10,000, $100, £100 or ¥20,000 a month — the maths never changes, only how the numbers are written. Pick your country from the header and amounts switch to your currency and your local convention: lakh and crore in India, Pakistan, Bangladesh, Nepal and Sri Lanka; million and billion in the US, UK, Canada, Australia and Europe; 万 and 億 in Japan, Korea, China and Taiwan.
What return should I assume? Indian equity index funds have historically returned roughly 11–13% a year over long periods; debt funds sit nearer 6–8%. Past performance is not a promise — run the Scenario Comparison to see how much your assumption matters.
How is SIP taxed in India? Equity mutual funds held over a year attract long-term capital gains tax at 12.5% on gains above the ₹1.25 lakh annual exemption. The Advanced SIP tool estimates that and shows the inflation-adjusted value.
What about EPF and NPS? Those are separate statutory schemes with their own rules — see the EPF calculator and NPS calculator, both of which stay in rupees because that is what the law defines them in.
United States. The equivalent is an automatic monthly contribution to an index fund or ETF, often inside a 401(k), Roth IRA or traditional IRA. Long-run S&P 500 returns have historically been around 10% a year before inflation. Set the currency to USD and the amounts read in dollars and millions.
United Kingdom. A monthly direct debit into a Stocks & Shares ISA or a workplace pension. Gains inside an ISA are free of capital gains tax, so the pre-tax figure here is the one that matters.
Canada and Australia. A pre-authorised contribution plan into an RRSP or TFSA in Canada, or salary-sacrifice contributions into superannuation in Australia.
UAE, Saudi Arabia and Singapore. A monthly savings or investment plan through your bank or broker. There is no personal capital gains tax in the Gulf, so the pre-tax result is your result.
Tax note. Tax rules are shown only for India, where we model them. Everywhere else the calculator reports pre-tax figures — deliberately, because a wrong tax number is worse than none. Check your own country's treatment.
Should I add a step-up? If your income rises each year, yes. Increasing your monthly investment by the same percentage as your salary keeps your savings rate constant instead of quietly letting it fall. A 10% annual step-up can add a third or more to a 20-year corpus.
What if I want to invest a single amount instead? Use the Lumpsum calculator. It compounds the whole sum from day one and reports the CAGR, post-tax value and what the money is worth after inflation. You can also enter a lumpsum alongside your monthly amount in the Initial Lumpsum field above to model both together.
Does the currency I pick change my result? No. The calculation is pure arithmetic on the numbers you enter — nothing is converted at any point. Changing country changes the symbol, the digit grouping and the starting defaults, never the maths.
Can I share my calculation? Yes. Share Result gives you a one-page PDF with your inputs, the chart and the full year-by-year table, plus a link that opens the calculator with your exact numbers filled in.
